This study used realistic evaluation to determine how, and in which circumstances, providing dairy farmers with benchmarked data on their calves can motivate improved colostrum management practices. Dairy from British Columbia, Canada were recruited through 2 veterinary clinics that offered benchmarking of calf as part services. For approximately 8 wk, blood samples collected newborn evaluate s...

The hemostatic properties of platelets to a large degree determine the activity metabolic processes that have great biological significance especially in early ontogeny. This study was conducted on 43 calves Holstein breed during phase milk-vegetable diet. It found observation period indicators were stable between 31 and 60 days life, platelet aggregation weakened. In blood there slight increas...

OBJECTIVE To evaluate the effect of orally administered cisapride, bethanechol, and erythromycin on the absorption of colostral IgG in dairy calves. ANIMALS Twenty-four healthy neonatal Holstein-Friesian calves. PROCEDURES Calves were randomly assigned to one of the following treatments: 0.9% NaCl solution (2 mL, p.o.; negative control); erythromycin lactobionate (20 mg/kg BW, p.o.; anticip...

The article analyzes the organismal status that determines adaptive potential of newborn calves to conditions technogenic anthropobiocenosis. A complex zootechnical, clinical, hematological, morphological and statistical methods research was used. Structural functional changes in fetal parts placentas cows arise as a result aggressive impact on mother's body modern ecosystem determine peculiari...

The objective of this study was to investigate the effects of different early weaning programs on growth performance and blood parameters of dairy calves. To meet this objective, thirty Holstein calves with initial body weight of 36 ± 5 kg were randomly assigned at birth to one of the three weaning programs. Experimental groups were: 1) starter diet and whole milk from birth to 6 weeks and wean...

There are two populations of sperm in bull semen. One consists of X-chromosome-bearing sperm; the other consists of Y-chromosome-bearing sperm. In contrast, all cattle ova contain an X chromosome. That is why when an X-chromosome-bearing sperm fertilizes the ovum a female (XX) develops, and when a Y-chromosome-bearing sperm fertilizes the ovum, a male (XY) develops. Ratios of the number of male...

Contentious issues in calf rearing include milk feeding level and single versus group housing. The current study was performed on a high-producing 170 Holstein cow dairy farm to investigate the impact of nutrition and housing on disease incidence. Calves (n=100) were allocated in birth order to one of two commonly used feeding strategies. Group A calves were group housed from birth and fed ad l...

The purpose of this study was to investigate the proportion of twins carried to term and the sex ratio of twin calves at birth in Holstein-Friesian dairy cattle kept on commercial farms in Devon and Cornwall, England. Ten farms were used in the study. Fifty four cows with twin pregnancies were identified using trans-rectal ultra-sonographic examination between 30 and 70 days of gestation. The f...

During the month of November there occurred an outbreak of pneumonia among the calves in a large dairy. Thirty-two calves in one barn were exposed to the disease. Ten clinical cases developed. Two died of diffuse pneumonia. From these bovisepticus Group I organisms were obtained at autopsy. Four affected with pneumonia and eight other calves which failed to show symptoms of pneumonia developed ...

BACKGROUND Vaccination of young calves against Bovine viral diarrhea virus (BVDV) is desirable in dairy and beef operations to reduce clinical disease and prevent spread of the virus among cattle. Although protection from clinical disease by multivalent, modified-live virus (MLV) vaccines has been demonstrated, the ability of MLV vaccines to prevent viremia and viral shedding in young calves po...